1240145240 has 48 divisors (see below), whose sum is σ = 2964146400. Its totient is φ = 466873856.

The previous prime is 1240145233. The next prime is 1240145261. The reversal of 1240145240 is 425410421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42080 + ... + 65199.

It is an arithmetic number, because the mean of its divisors is an integer number (61753050).

Almost surely, 2^1240145240 is an apocalyptic number.

1240145240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240145240 is an abundant number, since it is smaller than the sum of its proper divisors (1724001160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240145240 is a wasteful number, since it uses less digits than its factorization.

1240145240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107324 (or 107303 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1240145240 is about 35215.6959323538. The cubic root of 1240145240 is about 1074.3790147052.

Adding to 1240145240 its reverse (425410421), we get a palindrome (1665555661).

The spelling of 1240145240 in words is "one billion, two hundred forty million, one hundred forty-five thousand, two hundred forty".